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Accelerometer-measured physical activity at work and need for recovery: A compositional analysis of cross-sectional data
The National Research Centre for the Working Environment, Denmark.
The National Research Centre for the Working Environment, Denmark.
National research centre for the working environment, Denmark.
University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.ORCID iD: 0000-0002-2741-1868
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2019 (English)In: Annals of Work Exposures and Health, ISSN 2398-7308Article in journal (Refereed) Epub ahead of print
Abstract [en]

Objectives

Previous research has shown strong associations between occupational physical activity (OPA) and need for recovery (NFR). However this research has only utilized self-reported measures of OPA which may be biased. Thus, there is a need for investigating if the previously documented association between self-reported OPA and NFR can be found when using technical measures of OPA. There is also the need to investigate whether older workers are particularly susceptible to increased NFR, since age-related declines in physical capacity mean that it is likely these workers will have a higher NFR for a given physical activity. The aim of this study was to investigate the association between technically measured OPA and NFR, and whether this relationship is modified by age.

Methods

This study utilized data from the Danish Physical Activity Cohort with Objective Measurements cohort—comprising Danish workers (n = 840) from the cleaning, manufacturing, and transportation sectors. OPA was measured by accelerometers attached to the thigh and upper back for at least one work day and classified into four physical behaviour categories (sedentary, standing, light, or moderate/vigorous). NFR was measured using a shortened version of the Danish NFR scale. Analysis was conducted using linear regression and isotemporal substitution analyses for compositional data.

Results

The overall association between OPA and NFR was statistically significant in the unadjusted model (P < 0.001), but not when adjusted for age, sex, occupation, and shift work (P = 0.166). Isotemporal substitution showed small but significant reductions in NFR when increasing sedentary time relative to other behaviours (adjusted: ΔNFR = −0.010 [−0.019; −0.001]). There were no significant interactions between age and OPA (P = 0.409).

Conclusions

This study found significant associations between OPA and NFR, but the effect sizes were small. Reallocating 30 min to sedentary behaviours from other behaviours was associated with a reduced NFR, but the effect size may not be practically relevant. Moreover, no clear modifying effects of age were identified.

Place, publisher, year, edition, pages
Oxford University Press, 2019.
Keywords [en]
blue-collar workers, compositional data analysis, physical activity, physical behaviour, need for recovery, triaxial accelerometers
National Category
Occupational Health and Environmental Health
Research subject
Health-Promoting Work
Identifiers
URN: urn:nbn:se:hig:diva-31082DOI: 10.1093/annweh/wxz095PubMedID: 31879769OAI: oai:DiVA.org:hig-31082DiVA, id: diva2:1373008
Available from: 2019-11-26 Created: 2019-11-26 Last updated: 2020-01-24Bibliographically approved

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Hallman, David

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